Offers a curated list of "Farm Fonts," including many that are free for commercial use.
No single font named "Agriculture Bold" is distributed by major foundries, but several free alternatives match this description perfectly.
You're looking for good content related to agriculture, possibly with bold font options that are free to download. Here are some resources and ideas that might interest you:
Behance: Many independent designers offer "free for a limited time" bold display fonts that are perfect for unique branding. Tips for Using Your New Font Effectively